{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

04CHM114_0412

04CHM114_0412 - 5W HELP JETS-98d ngbfi‘f[gm 3"”...

Info icon This preview shows pages 1–9. Sign up to view the full content.

View Full Document Right Arrow Icon
Image of page 1

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 2
Image of page 3

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 4
Image of page 5

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 6
Image of page 7

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 8
Image of page 9
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: 5W HELP JETS-98d ngbfi‘f [gm 3"” 710w— CHEM 114 Spring 2004. Mon. Apr 12th. P: LectureNo. 31 H ‘5'°. E News Two component systems (cont'd) PHASE DIAGRAMS What happens during cooling of different compositions in the Fe- C system See Fig. 6 on .\ handout. 't fin -&}anralloy— oi euteetoid Gorgasltin— 45¢.”- \ “'“'" . “JR 1.le ‘ggé +..... 5M Mk6 ‘.~ CA Angeli, #11104 11:30 PM -0700, Fwd: Peal-lite Scans, et.al . Fm iii-i 9.24 Schematic J repmsenmlifl-ns m the mimostmctu'res fm' 5m iron—carbon alter]; of eutectuid campasitinu (0.75 wl'd'fi C} almvn: and hcluw [he euliecmid fempcralurci 110:} 1000 Emmi-aims: [“129 Compcagiijaa [Wm C) Eutectoid Cooling Schemat Ljpg 3A Angell, 4!11I04 11:30 PM -0700, Fwd: Peal-lite Scans, eta] 1" [u m: [Li-Ti thamicmgmph m“ Ii eulccmid steel showing the pcmlit: microstru-cmre consisijng at filtCII‘izuin'g layers af :1 fartiic (the: light phzm] and Feat; (thin layers- mos: 9f which appear 171:..ka Firm“! 9;“ 'Phntomicmgraph of a 1.4 wm; C steel having a microstmcturt: cmmisfing DE - a white praeutectoid atmcntitc n-elwurlc surmunding the pearlilr: wfionies. 10391-5. Pear1ite and Cementitejpg ‘Wh.*. :‘ P! 0!. hi: Mild steels: vs high tensile steels. 4' l”;- bn'ttle - ductile transition CA Angell, 4i11f04 11:30 PM 41700, Fwd: Pearlite Scans, eta! Fun I“. 9.23 thumicmgmph of a 11.33 wltfic C steel having a microsirucmm comislifig of pearlite and pmeuiectoid ferrite. fisfi‘x. (Photomicrogmph courlegy of Republic sue; Cflrporation‘) PearIite and Ferrite.ij Austenlte grain Fun In; 9.26: Schematic W353” represenlalinn of the forn‘latiun nf' pearlite from auszenile: direction of carbon diffusion indicated by arrows. Austen it: (fimfih directinn 6f waffle Samantha [Feam ' Carbon dlflusmn Pearlite Formation.ij UI Printed for Linda Russett <[email protected]> CA Angell, 4!11)'04 11:30 PM -0700, Fwd: Peal-lite Scans, et.al www.public . asu . edu!~caangell/ 'Temparakure Ft] Cu Cooling Schematic 1.ij 1.0- Campositlon (wt % C) 2A}! "Hut-Ina: ting? Schumann [representations 0!“. {he miLTmrucmres for an irunwcarbon alley {if hypowtecmid. wmpasétion Cu; {containing Hess: titan {1-536 mtg: C) as it is will-cal [mm wiufin the austen‘ite phase rcgian to belnw the eutectaid Ecmpcralmc. Quenched and tempered steels. Martensite, (steel that scratches glass) and Precipitation hardening 1. take room temperature high carbon steel and soak above eutectoid temperature Jcm “J‘Lfi’ ' HM pearlite (two phase) «9 Austenite (one phase) . I_> 720°C 3.: rd algal-u w 2. Quench in cold water. no time for pearlite to form. get Mayhem-ere T<<720°C Austenite (one phase) 9 Martensite (one phase) (HWIY dinm-Gflbic: it is hard brittle) me asta 6 3. Temper: Means soak at 650°C (below eutectoid) to "relieve metastability". Now nucleation of cementite starts at very many separate points and instead of growing layers it grows droplets (spheroids) of Fe3C. This structure is even tou her than the pearlitic structures. . .. the smctlwmrds (Toledo swords) that can take repeated sharp shocks without fracturing but still remain extremely strong. Samurai swords" extremely complex hierarchical structures, obtained by working and folding (different length scales). Welding, and risk of failure of high tensile steels. Id“ J +0 Ola/h" l 000‘ ' Jf rule 3 (nu-U ad. 6-1- 00-3 is 4......1‘ Mwmdu‘ ., Gvo—e/‘b: u; m 3.1+ . 3.6.. “In.“ (d) Other systems Duralumin.. the hardening of aluminium. (the role of SlllCPn; IEpretzipitati hardening” NI INOL AND MEMORY ALLOYS (for space station self-assembly) ...
View Full Document

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern